Intermittent grip mechanism.



c. JOHNSON. INTBBMITTENT GRIP MEGHANISM.

APPLICATION FILED JUNE 21, 1806.

918,451 Patented Apr. 13, 1909.

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UNITED STATES PATENT OFFTOE.,

CHRIS-:HAN JOHNSON, \OF ELGIN, ILLINOIS.-

INTERMITTENT GRIP IEECHANISM.

speciaeation of Lettere Patent.

Patented April 13, 1909.

Original application iiled April 15, 1904, Serial No. 203,286. Dividedand this application led June 21, 1906. i

4 Serial No. 322,731. f

To all 'wlwfm it may concern:

Be it known that LCHRISTIAN JOHNSON, a citizen of the United States,-residing at Elgin, in the-county of Kane and `State of Illinois, haveinvented certain new and useful Improvements in Intermittent GripMechanism, of which the following is a specification.

This invention relates particularly to intermittent gri mechanism usedin connection with win ing devices for spring motors for automatic pianoplayers, and especially lo the construction and arrangement of detailsand parts as will hereinafter more fully appear.

lThe principal object Of'this invention is to provide a simple,economical and etiicient intermittent grip mechanism used in lconnectionwith a `safety clutch, as set forth in my Patent No. 825,323,application No. 203,286, of which this application is a division,thoughl it. will be understood that this intermittent grip may be usedat any place where such devices are necessary.

In the accompanying drawings-Figure l is an elevation, Apartlyinsection, of my improved intermittent grip. Fig. 2 is a sectional view,'taken on the line 2 of Fig. 3. Fig. 3 is a? sectional detail, taken onthe line 3 o f Fig. 1. Fi 4. is ay perspective view Ot the disassociateparts of the mechanism,

showing. the relative arrangement thereof before the parts areassembled.

In the drawings I illustrate a double lever mechanism having frictionalengagement with an arbor or part to be rotated, all of which permitsrotation in one direction Wh-ile rotation in the other direction isprevented. To this end I provide a centrally' located wheel-or disk srigidly secured by means of a. pin t to the arbor or part to be`rotated.

' Ratchets u are provided and rigidly secured, b means of dowel pins o,toeach face of t e centrally located disk. Two operating levers w and ware provided, each of which has a bored hub portion y-rotatably mountedin position around the peri hery of the ratchets, `as shown particular yin l Figs. 3 and 4.` These bored hub portions are so mounted as toprovide a plurality of y pressed rollers ratchet spaces z between theratchets and the bored hub portions of the operating levers, and inthese ratchet spaces are movably mounted .rollers 10. lnterposed betweenthese rollers and the shoulders of the ratchets are helically coiledsprings 11, so arranged that as the operating lever mechanisms arevibrated in the direction -indicated by the arrow in Fig. l, the rollscause a gripping action to take place between thel lever and theratchet, so as to carrythe arbor around in One direction. It will beseen from an examination of the detail view shown in Fig. 4 that theratchets are secure to the faces of thec'entrally located disk in thesame manner. By this arrangement one of the operating levers rw can bevibrated in one direction, while the o erating lever is vibrated in theother irection, thus giving a constant step by step rotation to the keyarbor a. To hold the parts of the operating levers in position-in otherwords, to prevent the displacement of the operating levers, rolls andsprings ll from o erative positionface plates 12 are rovi ed and rigidlysecured to the faces o the ratchets,

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by means of headed screws 1 3.' It will be Observed that the lratchetsadjacent the shouldered portions are provided with Offsets ordepressions b, for the purpose of maintaining the angle between the faceof the ratchet portion u and the inner face of the vring y small enou hto secure positive- Afixed-to said disk, levers having. hub portionssurroundinv said ratchet wheels, spring between the said hub portionsand the ratchets, and retaining plates attached to the outside faces ofthe ratchet-v wheels. l

" CHRISTIAN JOHNSON.

Witnesses :-I

ANNIE C. COURTENAY, ANNA L. Savoia.

